Analysis of Common Problems with Milling Cutter Partitioning Machine

With the increasing refinement of electronic product manufacturing and the improvement of quality requirements. Due to the fact that panel splitting itself is a destructive process (from whole panel to single panel), more and more PCBA manufacturing companies are paying attention to how to reduce stress. At present, the most widely used method in the market is to use milling cutters and dividing machines. How can we better understand the milling cutter cutting machine? Currently, common problems include: 1. cutting accuracy; 2. Cutting efficiency; 3. Service life of milling cutter; 4. Dust management.

Cutting accuracy is affected by three factors:

1) The repetitive accuracy of the equipment itself can determine most of the cutting accuracy issues. The commonly used dual station dividing machine in the current market is the combination of X, Y, and Z linear motors for feeding and discharging, which has high cutting efficiency and accuracy.

2) Milling cutters are also a key factor in cutting. There are one-time processing and splicing milling cutters in the market, and one-time production milling cutters have higher coaxiality compared to splicing cutters.

3) The accuracy of fixtures and PCBA products, as well as the accuracy of PCB boards, should be ensured while ensuring the accuracy of fixtures. In order to ensure the accuracy of fixtures, we generally require customers to provide whole DXF file assembly boards and single block products.

Three factors that affect efficiency:

1. It is still related to the equipment structure, and under the same conditions, using a linear motor motion method has higher cutting efficiency than traditional use of screw rods.

2. Reaching the optimal balance point between the torque and speed of the main spindle can optimize the efficiency of the main spindle.

3. The design of circuit boards is related to milling cutters. For example, if a 1.6mm circuit board uses milling cutters with diameters of 1.0 and 1.5, the cutting speed of larger milling cutters will also be faster. If a 1.5 mm milling cutter is also used to cut PCB boards with thicknesses of 1.2mm and 1.6mm, the cutting resistance of the milling cutter is different, and the cutting speed of thin boards will be faster.

Based on the above conclusions, it is important to choose a suitable milling cutter for PCB boards. If the speed is too fast, it can cause the milling cutter to break or deform, resulting in uncontrollable arcs being cut.

The lifespan of milling cutters is closely related to cutting speed, milling cutter diameter, and cutting accuracy requirements.

1) The faster the cutting speed, the faster the wear of the milling cutter.

2) The diameter of the milling cutter determines the length of the effective cutting edge, and the larger the diameter, the more it is used.

3) The cutting accuracy requirement is also a factor that affects the lifespan of the milling cutter. If the cutting accuracy is required to be ± 0.07mm and ± 0.1mm, then ± 0.1mm cutting can allow the wear of the milling cutter to increase slightly, resulting in a longer service life.

Dust management

At present, dust management uses dust collectors for suction, and the dust collection methods are divided into upper dust collection, lower dust collection, or upper and lower integration.

Upper dust collection: It belongs to point-to-point dust collection, and the design of the pipeline and dust collector is relatively small. Due to the uniform distribution of air negative pressure in each stress area, the upper dust suction negative pressure and wind speed will be better. The milling cutter uses a right-hand cutter to remove dust upwards.

Lower dust collection: For products with high element components on both sides and inconvenient installation of brushes on the spindle. The milling cutter uses the right selection tool to remove dust downwards.

Upper and lower dust collection: Only a small number of customers use it, and due to the ventilation openings designed for the fixture and the unique nature of the product, it can be used. The reason is that simultaneously vacuuming up and down can generate vacuum at the cutting point, leading to unstable dust.